U.S. patent application number 16/069787 was filed with the patent office on 2019-08-22 for air-cooled plate-fin phase-change radiator with composite capillary grooves.
The applicant listed for this patent is CRRC DALIAN INSTITUTE CO., LTD.. Invention is credited to Liya Gu, Junjie LIU, Yuanbang Sun, Wencai Tan, Qinghe Zong.
Application Number | 20190257590 16/069787 |
Document ID | / |
Family ID | 58841539 |
Filed Date | 2019-08-22 |
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United States Patent
Application |
20190257590 |
Kind Code |
A1 |
LIU; Junjie ; et
al. |
August 22, 2019 |
Air-Cooled Plate-Fin Phase-Change Radiator with Composite Capillary
Grooves
Abstract
An air-cooled plate-fin phase-change radiator with composite
capillary grooves includes a heat exchanger box and a base plate.
Inside said base plate, there is a base plate inner cavity holding
the working medium. The heat exchanger box includes a cooling
medium channel. There are radiating fins I, and phase-change
channels set alternately inside the cooling medium channel. The
heat exchanger box is mounted on said base plate, connecting the
phase-change channels to the base plate inner cavity. The
phase-change channels and the base plate inner cavity form a closed
phase-change heat exchange chamber. Grooves are set on the inner
wall of phase-change channels. There are radiating fins II or metal
fiber felt inside said phase-change channels. Capillary channels
are set on the inner wall of said base plate inner cavity. The
highly integrated radiating fins I-phase-change channel compact
structure saves space effectively.
Inventors: |
LIU; Junjie; (Dalian,
Liaoning, CN) ; Tan; Wencai; (Dalian, Liaoning,
CN) ; Gu; Liya; (Dalian, Liaoning, CN) ; Zong;
Qinghe; (Dalian, Liaoning, CN) ; Sun; Yuanbang;
(Dalian, Liaoning, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CRRC DALIAN INSTITUTE CO., LTD. |
Dalian, Liaoning |
|
CN |
|
|
Family ID: |
58841539 |
Appl. No.: |
16/069787 |
Filed: |
June 14, 2017 |
PCT Filed: |
June 14, 2017 |
PCT NO: |
PCT/CN2017/088172 |
371 Date: |
July 12, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F28F 3/046 20130101;
F28F 21/085 20130101; F28F 2255/18 20130101; F28D 15/046 20130101;
F28F 2215/04 20130101; F28F 2210/10 20130101; F28F 21/084 20130101;
F28D 15/0275 20130101 |
International
Class: |
F28D 15/04 20060101
F28D015/04; F28F 3/04 20060101 F28F003/04; F28F 21/08 20060101
F28F021/08 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 23, 2017 |
CN |
201710058650.5 |
Claims
1. An air-cooled plate-fin phase-change radiator with composite
capillary grooves includes a heat exchanger box and a base plate,
wherein inside said base plate, there is a base plate inner cavity
holding the working medium; the heat exchanger box mentioned
includes a cooling medium channel; there are radiating fins I, and
phase-change channels set alternately inside the cooling medium
channel; the heat exchanger box mentioned is mounted on said base
plate, connecting the phase-change channels to the base plate inner
cavity, the phase-change channels and the base plate inner cavity
form a closed phase-change heat exchange chamber; grooves are set
on the inner wall of phase-change channels; there are radiating
fins II or metal fiber felt inside said phase-change channels; and
capillary channels are set on the inner wall of said base plate
inner cavity.
2. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein the radiating fins
II as well as the radiating fins I mentioned are rectangular
staggered-tooth fins, or flat-top sinusoidal staggered-tooth fins
or triangular corrugated fins; the capillary channels mentioned are
metal fiber felt, and are regular or irregular pores with an
equivalent diameter of 0.001-2 mm; and the porosity of the
capillary channels is 60%-90%.
3. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein the base plate
mentioned includes an upper cover base plate and a lower cover base
plate; on the inner wall of each base plate, there is metal fiber
felt; the upper cover base plate mentioned has bar-shaped holes
connecting the base plate inner cavity to the phase-change
channels.
4. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein between said upper
cover base plate and said lower cover base plate, there is a
supporting structure; said supporting structure is one or more
supporting pillars or supporting ribs, and metal fiber felt is set
on the outer wall of the mentioned supporting structure.
5. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein the radiating fins
I are rectangular staggered-tooth fins with a thickness of 0.05-0.5
mm; the pitch of their rectangular tooth waves is 3-15 mm, and the
wave height is 2-30 mm; and the opening width of rectangular tooth
incision is between 0.5 mm and a quarter of the wave pitch.
6. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein with both the width
and the depth of 0.1-1.5 mm, the grooves mentioned connect with the
pores of capillary channels.
7. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein a phase-change
channel consists of two parallel partitions and the side sealing
tapes on both ends of the partitions; the top of a phase-change
channel is sealed by a top sealing tape; and there are grooves on
the side of partitions and sealing tapes towards the phase-change
channel.
8. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein said radiating fins
I are clamped between the partitions from both sides of the cooling
medium channels; there are air sealing tapes at the top and bottom
of the mentioned cooling medium channel, and there are side guard
plates on both sides of the heat exchanger box mentioned.
9. The air-cooled plate-fin phase-change radiator with composite
capillary grooves according to claim 1, wherein the base material
of phase-change radiator mentioned is aluminum, aluminum alloy,
copper, or copper alloy.
Description
TECHNICAL FIELD
[0001] This invention involves a type of radiator, specifically an
air-cooled plate-fin composite phase-change radiator with capillary
grooves.
BACKGROUND TECHNOLOGY
[0002] Among the domestic and foreign heat transfer enhancement
technologies, many efficient phase-change heat transfer
technologies are developed based on the high heat transfer
coefficient and uniform temperature of vapor condensation and
liquid boiling evaporation. Although great achievements have been
achieved in reducing the boiler exhaust-gas temperature and in
recycling waste heat to improve heat efficiency, applications to
bullet train cooling are rarely reported. Seen from the current
research on phase-change heat exchangers, the reflux rate of
phase-change working medium is an important factor influencing the
heat transfer efficiency.
DESCRIPTION OF THE INVENTION
[0003] In response to the above problems, this invention designs a
kind of air-cooled plate-fin composite phase-change radiator with
capillary grooves by the following technical means:
[0004] An air-cooled plate-fin phase-change radiator with composite
capillary grooves includes a heat exchanger box and a base plate.
Inside said base plate, there is a base plate inner cavity holding
the working medium. The heat exchanger box mentioned includes a
cooling medium channel There are radiating fins I, and phase-change
channels set alternately inside the cooling medium channel. The
heat exchanger box mentioned is mounted on said base plate,
connecting the phase-change channels to the base plate inner
cavity. The phase-change channels and the base plate inner cavity
form a closed phase-change heat exchange chamber. Grooves are set
on the inner wall of phase-change channels. There are radiating
fins II or metal fiber felt inside said phase-change channels.
Capillary channels are set on the inner wall of said base plate
inner cavity.
[0005] Further, the radiating fins II as well as the radiating fins
I mentioned are rectangular staggered-tooth fins, or flat-top
sinusoidal staggered-tooth fins or triangular corrugated fins. The
capillary channels mentioned are metal fiber felt, and are regular
or irregular pores with an equivalent diameter of 0.001-2 mm. The
porosity of the capillary channels is 60%-90%.
[0006] Further, the base plate mentioned includes an upper cover
base plate and a lower cover base plate. On the inner wall of each
base plate, there is metal fiber felt. The upper cover base plate
mentioned has bar-shaped holes connecting the base plate inner
cavity to the phase-change channels.
[0007] Further, between said upper cover base plate and said lower
cover base plate, there is a supporting structure. The supporting
structure is one or more supporting pillars or supporting ribs, and
metal fiber felt is set on the outer wall of the mentioned
supporting structure.
[0008] Further, the radiating fins I are rectangular
staggered-tooth fins with a thickness of 0.05-0.5 mm. The pitch of
their rectangular tooth waves is 3-15 mm, and the wave height is
2-30 mm. The opening width of rectangular tooth incision is between
0.5 mm and a quarter of the wave pitch.
[0009] Further, with both the width and the depth of 0.1-1.5 mm,
the grooves mentioned connect with the pores of capillary
channels.
[0010] Further, a phase-change channel consists of two parallel
partitions and the side sealing tapes on both ends of the
partitions. The top of a phase-change channel is sealed by a top
sealing tape. There are grooves on the side of partitions and
sealing tapes towards the phase-change channel
[0011] Further, said radiating fins I are clamped between the
partitions from both sides of the cooling medium channels. There
are air sealing tapes at the top and bottom of the mentioned
cooling medium channel, and there are side guard plates on both
sides is of the heat exchanger box mentioned.
[0012] Further, the base material of phase-change radiator
mentioned is aluminum, aluminum alloy, copper, or copper alloy.
[0013] Over the prior art, the air-cooled plate-fin phase-change
radiator with composite capillary grooves mentioned in this
invention has the following advantages:
[0014] 1. Working medium phase change is used to realize rapid
conduction and high heat transfer efficiency;
[0015] 2. Air-cooled radiation based on the fins of sine-square
wave composite structure realizes efficient radiation and omits the
setting of water tanks;
[0016] 3. The highly integrated radiating fins I-phase-change
channel compact structure saves space effectively. The size and
number of phase-change channels are adjustable. The heat exchanger
has a wide applicable power range.
[0017] 4. The composite structure of grooves and tooth fins in the
phase-change channel increases the heat exchange area greatly,
making the heat transfer working medium condensate rapidly at the
radiation end and flow back rapidly in the rectangular tooth fin
face and in the capillary groove, in the presence of both weight
and capillary ability.
[0018] 5. The sintering metal fiber felt in the cavity can help the
working medium with reflux and prevent the working medium from
evaporating to dryness. Also, the metal fiber felt makes the liquid
working medium uniform distributed on the entire cavity is surface,
realizing the uniform temperature of base plate.
[0019] 6. The supporting pillar or supporting rib inside the base
plate inner cavity prevents the base plate from deforming. Besides,
the auxiliary fiber felt on its surface can speed up the reflux of
working medium.
DESCRIPTION OF FIGURES
[0020] FIG. 1 shows the structure of this embodiment of the
invention.
[0021] FIG. 2a shows the internal structure of the phase-change
channel mentioned in the embodiment of the invention (rectangular
staggered-tooth fins).
[0022] FIG. 2b shows the internal structure of phase-change channel
mentioned in the embodiment of the invention (flat-top sinusoidal
tooth fins).
[0023] FIG. 2c shows the internal structure of phase-change channel
mentioned in the embodiment of the invention (triangular corrugated
fins).
[0024] FIG. 3 shows the structure of base plate mentioned in the
embodiment of the invention.
[0025] FIG. 4 shows the top view of the embodiment of the
invention.
[0026] FIG. 5 shows the structure of flat-top sinusoidal tooth fin
mentioned in the embodiment of the invention.
[0027] FIG. 6 shows the stereoscopic structure of rectangular tooth
fin mentioned in the embodiment of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0028] Referring to FIGS. 1-6, an air-cooled plate-fin phase-change
radiator with composite capillary grooves includes a heat exchanger
box and base plates. Inside such a base plate, there is an inner
cavity 3 holding the working medium. The heat exchanger box
composed of a cooling medium channel 10. There are radiating fins I
11, and phase-change channels 6 set alternately inside the cooling
medium channel 10. The heat exchanger box is mounted on said base
plate to connect the phase-change channels 6 to the base plate
inner cavity 3. The phase-change channels 6 and the base plate
inner cavity 3 form a closed phase-change heat exchange chamber.
The phase-change heat exchange chamber is vacuumed to a vacuum
chamber in use, and the base plate inner cavity 3 is filled with
working medium. Grooves 5 are set on the inner wall of phase-change
channel 6. There are radiating fins II 7 or a metal fiber felt
fixed on the inner wall of the phase-change channel 6. Capillary
channels are set on the inner wall of base plate inner cavity
3.
[0029] In this embodiment, the capillary channels mentioned are
metal fiber felt, and are regular or irregular pores with an
equivalent diameter of 0.001-2 mm. And the porosity of the
capillary channels is 60%-90%. The base plate mentioned includes an
upper cover base plate 2 and a lower cover base plate 1 welded
together. Between the upper cover base plate 2 and the lower cover
base plate 1, there is a supporting structure 12. The supporting
structure includes one or more supporting pillars or supporting
ribs. There is metal fiber felt on the inner wall of the upper
cover base plate 2 and the lower cover base plate 1. The upper
metal fiber felt 15 is on the inner wall of upper cover base plate
2, and the lower metal fiber felt 16 is on the inner wall of lower
cover base plate 1. On the outer wall of supporting structure 12,
there is auxiliary fiber felt 13. The upper metal fiber felt 15,
the lower metal fiber felt 16, and the auxiliary fiber felt 13
mentioned can be either the same or different and their pores are
all connected. The metal fiber felt is sintered on the inner wall
of the base plate or on the outer wall of support pillars. The
upper cover base plate 2 mentioned has bar-shaped holes 14
connecting the base plate inner cavity to the phase-change
channels. The supporting structure 12 mentioned can be a
cylindrical, prismatic, oval or oblate, or bar-shaped rib, as
needed.
[0030] The phase-change channel 6 mentioned consists of two
parallel partitions 18 and the side sealing tapes 17 on both ends
of partitions 18. The partitions 18 and side sealing tapes 17 are
fixed, by braze welding, into a phase-change channel 6 with a
rectangular section. The top of the phase-change channel is sealed
by a top sealing tape 8 and the bottom is fixed at the bar-shaped
hole of upper cover base plate 2. There are grooves 5 on the side
of partitions 18 and the inside of side sealing tapes 17 towards
the phase-change channel In this embodiment, grooves 5 are
longitudinal grooves with a rectangular, trapezoidal,
semi-circular, or sinusoidal section, and their width and depth are
0.15-1.5 mm. These grooves connect with the pores of capillary
channel The existence of grooves increases the heat exchange area,
making the working medium condensate rapidly on the inner wall of
phase-change channels 6 and flow back rapidly in grooves 5, in the
presence of both weight and capillary ability. The air-cooled
combination saves the setting of water tanks and achieves the
effects of heat transfer and storage, improving the heat radiation
efficiency of the system.
[0031] Radiating fins I 11 are clamped between the partitions 18
from both sides of the cooling medium channels 10. In this
embodiment, the cooling medium channel 10 is an air channel. That
is to say, the cooling medium is air. The wave peaks of radiating
fins I 11 mentioned are braze welded on the partitions 18. At the
top and bottom of the cooling medium channel mentioned, there are
air sealing tapes 9. On both sides of the heat exchanger box
mentioned, there are side guard plates 19.
[0032] Referring to FIGS. 2a, 2b and 2c, the radiating fins II 7 as
well as the radiating fins I 11 mentioned are rectangular
staggered-tooth fins, or flat-top sinusoidal tooth fins, or
triangular corrugated fins. The sinusoidal waves with peaks cut
flat are flat-top sinusoidal waveform.
[0033] The radiating fins I 11 mentioned are rectangular
staggered-tooth fins. Of to radiating fins I, the thickness is
0.05-0.5 mm, and the wave height is 2-30 mm. Of radiating fins I
11, the wavelength of rectangular tooth wave is 3-15 mm, and the
peak height 2-30 mm. The opening width of rectangular tooth
incision is 0 mm-1/4 wave pitch.
[0034] The base material of phase-change radiator is aluminum,
aluminum alloy, copper or copper alloy. Components can be made of
either the same material or different materials.
[0035] In this embodiment, the structure of plate-fin radiator is
used, and the heat absorption in vaporization and the heat
radiation in liquefaction of the phase-change working medium
realize the efficient heat transfer. The liquefaction end and air
cooling intensify the heat radiation, taking away heat rapidly.
Rectangular staggered-tooth fins increase the heat exchange area
greatly. The heat transfer working medium condensates rapidly at
the heat radiation side and flows back rapidly in the rectangular
staggered-tooth fin face and in capillary grooves, in the presence
of both weight and capillary ability. The air-cooled combination
saves the installation of water tanks and achieves the effects of
heat transfer and storage, improving the heat radiation efficiency
of the system. The intra-cavity sintering fiber can help the
working medium with reflux and prevent the working medium from
evaporating to dryness. Also, the fiber layer makes the liquid
working medium uniform on the entire cavity surface, realizing the
uniform temperature of base plate.
[0036] The embodiment mentioned above describes the preferred
embodiment of this invention only. It does not define the range of
this invention. All variations and improvements of this invention
made by the ordinary technicians in this field should fall within
the scope of protection defined in the claims of this invention,
provided that these variations and improvements do not deviate from
the spirit of this invention is design.
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